.box {
    width: 100%;
    height: 100vh;
    background:url('https://ss0.bdstatic.com/70cFvHSh_Q1YnxGkpoWK1HF6hhy/it/u=1191682028,3000728692&fm=26&gp=0.jpg') no-repeat;
    background-size: 100% 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #000;
    font-weight: 600px;
    font-size: 28px;
}